The Cornwall Borough Water & Sewer Dept does require a permit prior to the digging of a well.  The law requires residents to use the public water system for domestic use if available.  Wells drilled for the purpose of Geo-thermal heat are permitted.  Well locations must be tracked per Department of Environmental Protection (DEP).
The permit for well digging is available on line under Permits/Download Forms.
Please remember to call 811 (Pa One Call System) prior to any dig.